regress-68498-004.js   [plain text]

/*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation.  Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s): brendan@mozilla.org, pschwartau@netscape.com  
* Date: 15 Feb 2001
*
* SUMMARY:  self.eval(str) inside a function
* NOTE: 'self' is just a variable used to capture the global JS object.
*
* See http://bugzilla.mozilla.org/show_bug.cgi?id=68498
* See http://bugzilla.mozilla.org/showattachment.cgi?attach_id=25251
* See http://bugzilla.mozilla.org/show_bug.cgi?id=69441 (!!!)
*
* Brendan:
*
* "ECMA-262 Edition 3, 10.1.3 requires a FunctionDeclaration parsed as part 
* of  a Program by eval to create a property of eval's caller's variable object.
* This test evals in the body of a with statement, whose scope chain *is*
* relevant to the effect of parsing the FunctionDeclaration."
*/
//-------------------------------------------------------------------------------------------------
var bug = 68498;
var summary = 'Testing self.eval(str) inside a function';
var statprefix = '; currently at expect[';
var statsuffix = '] within test -';
var sToEval='';
var actual=[ ];
var expect=[ ];


// Capture a reference to the global object -
var self = this;

// You shouldn't see this global variable's value in any printout -
var x = 'outer';

// This function is the heart of the test - 
function f(o,s,x) {with(o) eval(s); return z;};

// Run-time statements to pass to the eval inside f
sToEval += 'actual[0] = typeof g;'
sToEval += 'function g(){actual[1]=(typeof w == "undefined"  ||  w); return x};'
sToEval += 'actual[2] = w;'
sToEval += 'actual[3] = typeof g;'
sToEval += 'var z=g();'

// Set the actual-results array. The next line will set actual[0] - actual[4] in one shot
actual[4] = f({w:44}, sToEval, 'inner');
actual[5] = 'z' in self && z;


/* Set the expected-results array.
* 
*  Sample issue: why do we set expect[4] = 'inner'?  Look at actual[4]...
*  1. The return value of f equals z, which is not defined at compile-time
*  2. At run-time (via with(o) eval(s) inside f), z is defined as the return value of g
*  3. At run-time (via with(o) eval(s) inside f), g is defined to return x
*  4. In the scope of with(o), x is undefined
*  5. Farther up the scope chain, x can be located as an argument of f
*  6. The value of this argument at run-time is 'inner'
*  7. Even farther up the scope chain, the name x can be found as a global variable
*  8. The value of this global variable is 'outer', but we should NOT have gone
*      this far up the scope chain to find x...therefore we expect 'inner'
*/
expect[0] = 'function';
expect[1] = 44;
expect[2] = 44;
expect[3] = 'function';
expect[4] = 'inner';
expect[5] = false;



//------------------------------------------------------------------------------------------------
test();
//-------------------------------------------------------------------------------------------------


function test()
{
  enterFunc ('test');
  printBugNumber (bug);
  printStatus (summary);

  for (var i in expect)
  {
    reportCompare(expect[i], actual[i], getStatus(i));
  }

  exitFunc ('test');
}


function getStatus(i)
{
  return (summary  +  statprefix  +  i  +  statsuffix);
}